Thanks Ian is the pump connector a simple twist and turn and what about the need to fit news seals?
When using the Oetiker clamp are we looking at single or double ear.
You are absolutely correct, banjo fitting, I must have been looking at the LP return side which has a funny in line white plastic valve.
You don't know the size of the copper washers do you.
I thought to anneal copper you heat it to cherry red then quench.
I always thought you should quench the copper too, it is the opposite of annealing steel which requires slow cooling.
The rate of cooling is not significant in the case of copper, but quenching in cold water will make the oxidation very easy to wipe off.